<template>
  <div class="top-right-btn" :style="style">
    <el-row>
      <slot></slot>
      <el-tooltip class="item" effect="dark" :content="showSearch ? '隐藏搜索' : '显示搜索'" placement="top" v-if="search">
        <el-button circle :icon="showSearch ? 'ArrowUp' : 'ArrowDown'" @click="toggleSearch()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="刷新" placement="top">
        <el-button circle icon="Refresh" @click="refresh()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="显隐列" placement="top" v-if="columns">
        <el-button circle icon="Menu" @click="showColumn()" />
      </el-tooltip>
    </el-row>
    <el-dialog :title="title" v-model="open" append-to-body>
      <el-transfer
        :titles="['显示', '隐藏']"
        v-model="value"
        :data="columns"
        @change="dataChange"
      ></el-transfer>
    </el-dialog>
  </div>
</template>

<script setup>
  const props = defineProps({
    showSearch: {
      type: Boolean,
      default: true
    },
    columns: {
      type: Array
    },
    search: {
      type: Boolean,
      default: true
    },
    gutter: {
      type: Number,
      default: 10
    }
  })

  const emits = defineEmits(['update:showSearch', 'queryTable'])

  // 显隐数据
  const value = ref([])
  // 弹出层标题
  const title = ref("显示/隐藏")
  // 是否显示弹出层
  const open = ref(false)

  const style = computed(() => {
    const ret = {}
    if (props.gutter) {
      ret.marginRight = `${props.gutter / 2}px`
    }
    return ret
  })

  // 搜索
  function toggleSearch() {
    emits("update:showSearch", !props.showSearch)
  }

  // 刷新
  function refresh() {
    emits("queryTable")
  }

  // 右侧列表元素变化
  function dataChange(data) {
    for (let item in props.columns) {
      const key = props.columns[item].key
      props.columns[item].visible = !data.includes(key)
    }
  }

  // 打开显隐列dialog
  function showColumn() {
    open.value = true
  }

  // 显隐列初始默认隐藏列
  for (let item in props.columns) {
    if (props.columns[item].visible === false) {
      value.value.push(parseInt(item))
    }
  }
</script>

<style lang='scss' scoped>
:deep(.el-transfer__button) {
  border-radius: 50%;
  display: block;
  margin-left: 0px;
}
:deep(.el-transfer__button:first-child) {
  margin-bottom: 10px;
}

.my-el-transfer {
  text-align: center;
}
</style>